Neutral Ph Paper, Having Long-Lasting Properties

This page is the CodyCross answer for the clue below from Prehistory, Group 1257, Puzzle 5 (Glacial Impact).

Question is: Neutral Ph Paper, Having Long-Lasting Properties

and the answer is: ARCHIVAL

Word Meaning:

ARCHIVAL — Of or pertaining to an archive or archiving.

Definitions from Wiktionary.